The endurance limit for a tissue:

7. What is the muscle torque required from the illiopsoas to maintain the leg in this position of 20 degrees of flexion from the horizontal?

26. Which of the following are consistent with Wolff’s law

10. Consider the following free body diagram of the forearm and hand segment. If the muscle moment arm is 1/3 the distance of the segment weight moment arm (to the center of mass) and the muscle force acts directly vertical, to maintain static equilibrium, the elbow flexor muscle force must be what percentage of forearm weight?  

22. EMG filtering and processing:

24. If the shoulder is flexed to 90 degrees and the elbow is fully flexed and held statically, more EMG signal is recorded from the long head of the biceps as compared to when the shoulder is flexed to 90 degrees and the elbow is extended. This indicates:

For the following 2 questions, use the equations you developed in B above and account for the proper sign. Show all steps of your work. Use 4 decimal places for sin, cos, or distance values, and 1 decimal for final force and torque values. The moment arms are .0087 m for the muscle, and .2819 m for the weight of the limb.

8. What is the resultant muscle force required to maintain the leg in this position ?

27. People may be more susceptible to spinal disc herniation later in the day after having been in an upright posture for prolonged periods. Which of the following are consistent with this theory and with principles of tissue mechanics:

4. What would be the effect on the muscle force required if the arms were held across the chest rather than behind the head during a sit-up?